set terminal postscript enhanced eps monochrome 
set output '1.ps'
set ylabel "Time (ms)"
set boxwidth 0.1 absolute
set xtic rotate by 0 scale 0

set style fill solid 1.00 border -1
set style histogram rowstacked
set style line 1 lt rgb "white"
set style line 2 lc rgb "light-gray"
set style line 3 lt rgb "dark-gray"
set style line 4 lt rgb "black"
set style data histograms
set xtics 1000 nomirror
set ytics 100 nomirror
set mxtics 2
set mytics 2
set ytics 10
set yrange [0:130]
plot 'udp-echo.dat' using 2 t "transfer" fs solid 0.66 lt 1, '' using 3:xtic(1) t "processing" fs solid 0 lt 3
